Rotational temperatures of Venus upper atmosphere as measured by SOIR on board Venus Express

DOI: 
10.1016/j.pss.2014.12.020
Publication date: 
01/08/2015
Main author: 
Mahieux A.
IAA authors: 
Mahieux A.;López Valverde M.A.;López Puertas M.;Funke B.
Authors: 
Mahieux A., Vandaele A.C., Robert S., Wilquet V., Drummond R., López Valverde M.A., López Puertas M., Funke B., Bertaux J.L.
Journal: 
Planetary and Space Science
Refereed: 
Yes
Publication type: 
Article
Volume: 
113-114
Pages: 
347-358
Number: 
3887
Abstract: 
Abstract SOIR is a powerful infrared spectrometer flying on board the Venus Express spacecraft since mid-2006. It sounds the Venus atmosphere above the cloud layer using the solar occultation technique. In the recorded spectra, absorption structures from many species are observed, among them carbon dioxide, the main constituent of the Venus atmosphere. Previously, temperature vertical profiles were derived from the carbon dioxide density retrieved from the SOIR spectra by assuming hydrostatic equilibrium. These profiles show a permanent cold layer at 125 km with temperatures of ~100 K, surrounded by two warmer layers at 90 and 140 km, reaching temperatures of ~200 K and 250-300 K, respectively. In this work, temperature profiles are derived from the SOIR spectra using another technique based on the ro-vibrational structure of carbon dioxide observed in the spectra. The error budget is extensively investigated. Temperature profiles obtained by both techniques are comparable within their respective uncertainties and they confirm the vertical structure previously determined from SOIR spectra. © 2015 Elsevier Ltd.
Database: 
WOK
SCOPUS
ADS
SCOPUS
URL: 
https://ui.adsabs.harvard.edu/#abs/2015P&SS..113..347M/abstract
ADS Bibcode: 
2015P&SS..113..347M
Keywords: 
Planetary atmosphere; Rotational temperature; Venus